Messages in this thread | | | From | Andy Lutomirski <> | Date | Mon, 11 Jan 2016 17:25:06 -0800 | Subject | Re: [PATCH] selftests/x86: Disable ldt_gdt_64 for now |
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On Mon, Jan 11, 2016 at 2:59 AM, Ingo Molnar <mingo@kernel.org> wrote: > > * Shuah Khan <shuahkh@osg.samsung.com> wrote: > >> On 01/06/2016 12:51 PM, Andy Lutomirski wrote: >> > ldt_gdt.c relies on cross-cpu invalidation of SS to do one of its >> > tests. On 32-bit builds, this works fine, but on 64-bit builds, it >> > only works if the kernel has proper SS sigcontext handling for >> > 64-bit user programs. >> > >> > Since the SS fixes are currently reverted, restrict the test case to >> > 32 bits for now. >> > >> > In principle, I could change the test to use a different segment >> > register, but it would be messy: CS can't point to the LDT for >> > 64-bit code, and the other registers don't result in immediate >> > faults because they aren't reloaded on kernel -> user transitions. >> > >> > When we fix sigcontext (in 4.6?), we can revert this. >> > >> > Signed-off-by: Andy Lutomirski <luto@kernel.org> >> > -- >> >> Andy, >> >> This patch didn't apply to linux-kselftest next. >> It probably has to go through x86. > > It doesn't apply to -tip either. Andy, which tree is this against?
Oops, it applies on top of a new self-test that I forgot to send. I send a v2 that should be better. I'll send the new selftest out as well once -tip catches up with all the vdso patches.
--Andy
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